Drugs are chemicals. Different drugs, because of their chemical structures, can affect the body in different ways. In fact, some drugs can even change a person's body and brain in ways that last long after the person has stopped taking drugs, maybe even permanently.
USED OIL is defined as any oil that has been refined from crude oil, or any synthetic oil, that. has been used and as a result, is contaminated by physical or chemical impurities. If you do, use the information in this publication to help make the best choices in managing them.
oil noun [U]. âº NATURAL RESOURCES a thick âliquid that comes from under the Earth's surface and is used as a âfuel and for making âplastics, etc.: More than 6,000 ârigs were âdrilling for oil and âgas.